# SDR ASAA2018110926833

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 9, 2018
- Submitted: November 14, 2018
- Operation: Air carrier
- Aircraft: [N588AS](https://openairdocs.org/aircraft/N588AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35685
- Aircraft time: 41,964 hours, 12,706 cycles
- System (JASC): [7921 · Engine Oil Cooler](https://openairdocs.org/jasc/7921)
- Part: Oil Cooler
- Part number: 453328039
- Part serial: YB028560L
- Condition: Failed
- Location: Nr 2 Engine
- Part time: 44,714 hours, 13,381 cycles
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2018110926833

## Discrepancy

NR 2 ENG MAIN OIL/FUEL HEAT EXCHANGER FAILED RUN ON TORQUE CHECK FOR FUEL TUBE (7) REF AMM 79-21-02-400-801-F00 STEP 3 G (3) (H),3. GROUNDED - YES. REPLACED NR 2 ENG MAIN OIL/FUEL HEAT EXCHANGER PER AMM 79-21-02. LEAK CHECK GOOD. GROUND VERIFICATION GOOD.

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